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// Copyright (c) 2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/sys_info.h"
#include <errno.h>
#include <string.h>
#include <sys/statvfs.h>
#include <sys/utsname.h>
#include <unistd.h>
#if defined(OS_MACOSX)
#include <ApplicationServices/ApplicationServices.h>
#include <mach/mach_host.h>
#include <mach/mach_init.h>
#endif
#if defined(OS_OPENBSD)
#include <sys/param.h>
#include <sys/sysctl.h>
#endif
#include "base/basictypes.h"
#include "base/file_util.h"
#include "base/logging.h"
#include "base/utf_string_conversions.h"
namespace base {
int SysInfo::NumberOfProcessors() {
#if defined(OS_OPENBSD)
int mib[] = { CTL_HW, HW_NCPU };
int ncpu;
size_t size = sizeof(ncpu);
if (sysctl(mib, 2, &ncpu, &size, NULL, 0) == -1) {
NOTREACHED();
return 1;
}
return ncpu;
#else
// It seems that sysconf returns the number of "logical" processors on both
// mac and linux. So we get the number of "online logical" processors.
long res = sysconf(_SC_NPROCESSORS_ONLN);
if (res == -1) {
NOTREACHED();
return 1;
}
return static_cast<int>(res);
#endif
}
// static
int64 SysInfo::AmountOfPhysicalMemory() {
// _SC_PHYS_PAGES is not part of POSIX and not available on OS X or
// FreeBSD
#if defined(OS_MACOSX)
struct host_basic_info hostinfo;
mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
int result = host_info(mach_host_self(),
HOST_BASIC_INFO,
reinterpret_cast<host_info_t>(&hostinfo),
&count);
DCHECK_EQ(HOST_BASIC_INFO_COUNT, count);
if (result != KERN_SUCCESS) {
NOTREACHED();
return 0;
}
return static_cast<int64>(hostinfo.max_mem);
#elif defined(OS_FREEBSD)
// TODO(benl): I have no idea how to get this
NOTIMPLEMENTED();
return 0;
#else
long pages = sysconf(_SC_PHYS_PAGES);
long page_size = sysconf(_SC_PAGE_SIZE);
if (pages == -1 || page_size == -1) {
NOTREACHED();
return 0;
}
return static_cast<int64>(pages) * page_size;
#endif
}
// static
int64 SysInfo::AmountOfFreeDiskSpace(const std::wstring& path) {
struct statvfs stats;
if (statvfs(WideToUTF8(path).c_str(), &stats) != 0) {
return -1;
}
return static_cast<int64>(stats.f_bavail) * stats.f_frsize;
}
// static
bool SysInfo::HasEnvVar(const wchar_t* var) {
std::string var_utf8 = WideToUTF8(std::wstring(var));
return getenv(var_utf8.c_str()) != NULL;
}
// static
std::wstring SysInfo::GetEnvVar(const wchar_t* var) {
std::string var_utf8 = WideToUTF8(std::wstring(var));
char* value = getenv(var_utf8.c_str());
if (!value) {
return std::wstring();
} else {
return UTF8ToWide(value);
}
}
// static
std::string SysInfo::OperatingSystemName() {
utsname info;
if (uname(&info) < 0) {
NOTREACHED();
return "";
}
return std::string(info.sysname);
}
// static
std::string SysInfo::OperatingSystemVersion() {
utsname info;
if (uname(&info) < 0) {
NOTREACHED();
return "";
}
return std::string(info.release);
}
// static
std::string SysInfo::CPUArchitecture() {
utsname info;
if (uname(&info) < 0) {
NOTREACHED();
return "";
}
return std::string(info.machine);
}
// static
void SysInfo::GetPrimaryDisplayDimensions(int* width, int* height) {
#if defined(OS_MACOSX)
CGDirectDisplayID main_display = CGMainDisplayID();
if (width)
*width = CGDisplayPixelsWide(main_display);
if (height)
*height = CGDisplayPixelsHigh(main_display);
#else
// TODO(port): http://crbug.com/21732
NOTIMPLEMENTED();
if (width)
*width = 0;
if (height)
*height = 0;
#endif
}
// static
int SysInfo::DisplayCount() {
#if defined(OS_MACOSX)
// Don't just return the number of online displays. It includes displays
// that mirror other displays, which are not desired in the count. It's
// tempting to use the count returned by CGGetActiveDisplayList, but active
// displays exclude sleeping displays, and those are desired in the count.
// It would be ridiculous to have this many displays connected, but
// CGDirectDisplayID is just an integer, so supporting up to this many
// doesn't hurt.
CGDirectDisplayID online_displays[128];
CGDisplayCount online_display_count = 0;
if (CGGetOnlineDisplayList(arraysize(online_displays),
online_displays,
&online_display_count) != kCGErrorSuccess) {
// 1 is a reasonable assumption.
return 1;
}
int display_count = 0;
for (CGDisplayCount online_display_index = 0;
online_display_index < online_display_count;
++online_display_index) {
CGDirectDisplayID online_display = online_displays[online_display_index];
if (CGDisplayMirrorsDisplay(online_display) == kCGNullDirectDisplay) {
// If this display doesn't mirror any other, include it in the count.
// The primary display in a mirrored set will be counted, but those that
// mirror it will not be.
++display_count;
}
}
return display_count;
#else
// TODO(port): http://crbug.com/21732
NOTIMPLEMENTED();
return 1;
#endif
}
// static
size_t SysInfo::VMAllocationGranularity() {
return getpagesize();
}
#if defined(OS_LINUX)
// static
size_t SysInfo::MaxSharedMemorySize() {
static size_t limit;
static bool limit_valid = false;
if (!limit_valid) {
std::string contents;
file_util::ReadFileToString(FilePath("/proc/sys/kernel/shmmax"), &contents);
limit = strtoul(contents.c_str(), NULL, 0);
limit_valid = true;
}
return limit;
}
#endif
} // namespace base
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